Novel Zn–Ti-based mixed metal oxides for low-temperature adsorption of H2S from industrial gas streams

Polychronopoulou, Kyriaki; Fierro, J. L. G.; Efstathiou, Angelos M.

doi:10.1016/j.apcatb.2004.10.017

Cited by 93 publications

(89 citation statements)

References 27 publications

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“…Polychronopoulou et al [4] studied sulphur removal with the feed containing 1% water and they found water acting as positive component to increase the adsorption capacities of ZnO below 100ºC. They found the adsorption capacity at 25ºC with 1% water which is 4 times compared to capacity without water.…”

Section: H 2 S Adsorptionmentioning

confidence: 99%

H2S and Siloxane D5 Removal from Anaerobic Digestion Gas by Adsorption

et al. 2017

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Abstract:Global warming and depletion of fossil fuel enhances people to obtain alternative clean sources of energy. The key objective of this study was to develop adsorbent systems for sulphur (from H 2 S) and siloxanes removal from the anaerobic digestion gas (ADG) by commercially available adsorbents for a solid oxide fuel cell (SOFC) application. The target limits for removal of sulphur and siloxane compounds were less than 1 ppmv and 100ppbv respectively for the SOFC application. Based on the results of this work (this work is a part of a European Union project named SOFcom) and some other projects of SOFcom, a pilot plant of SOFC (capacity 100 kW fuel energy) will attempt to operate using the ADG produced from the Torino Sewage Plant, Italy. Different types of siloxanes were available in the ADG, among them D5 was chosen as representative for their higher concentrations (1200ppbv) in Torino, Italy. However, all types of siloxanes are also possible to remove from ADG by the same adsorbent. Commercially available adsorbents such as Activated Carbon (sigma), Zeolite 5A, FCDS GS-1(ZnO) and FCDS GS6, Active carbon (Norit RST3) and Soxsia were explored in the fixed bed reactor in laboratory. Artificially simulated ADG was tested in the laboratory (for simplicity) to determine the adsorption capacities of adsorbents. FCDS GS-1 (48 mg/g) and Norit RST3 (55.7 mg/g) were performed as best adsorbents for sulphur and siloxane D5 removal respectively.

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Section: H 2 S Adsorptionmentioning

confidence: 99%

H2S and Siloxane D5 Removal from Anaerobic Digestion Gas by Adsorption

et al. 2017

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“…However previous studies [49,50] have shown the desulphurisation potential of ZnO in removal of hydrogen sulphide (H2S) from industrial processes (natural gas processing, petroleum refining, petrochemical plants, coke ovens and coal gasifiers). The use of ZnO in the removal of H2S demonstrates its basic properties, as presented below by RQ-4 [50].…”

Section: Mass Balancementioning

confidence: 99%

An experimental study of ash behaviour and the potential fate of ZnO/Zn in the Co-combustion of pulverised South African coal and waste tyre rubber

Singh

Nimmo

Williams

2013

Fuel

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A Novel combustion application utilising waste tyre rubber (WTR) as a secondary fuel in pulverised coal power plants is presented. Co-combustion of a South African coal (SAf) with WTR at the fuel fractions (FF) 4.1%, 14.1% and 19.7% along with the pure firing of WTR was conducted in an 80 kWth combustion test facility (CTF). This study assessed the potential slagging and fouling behaviour of the resultant ashes produced from co-firing SAf/WTR and pure fired WTR. XRF and ICP/OES analysis of the co-fired SAf/WTR and pure fired WTR ashes revealed a high composition of acidic oxides. Based on the fusibility indices (B/A, RS, SR, F and Fu) it was determined that co-fired SAf/WTR and pure fired WTR ashes carry a low risk of slagging and fouling. ZnO is incorporated in the manufacturing of tyres as a compounding additive. ZnO is present within raw WTR, posing the question as to its fate during combustion. In this study ash collected and analysed from the pure fired WTR and co-fired SAf/WTR exhibited lower levels of Zn than anticipated. It is suggested that ZnO remains in the vapour phase within the CTF at temperatures >1200 o C. Experimental analysis found Zn enrichment at lower temperatures was not significant within the fly ash collected by the cyclone trap or ash deposits collected from the water cooled sections of the CTF. This suggests that Zn could be forming a submicron aerosol. It is further noted that ZnO/Zn is not likely to contribute significantly in the slagging/fouling mechanisms, due to its volatile nature. However this present study highlights the need for further experimental assessment of co-firing SAf/WTR required prior to any industrial application.

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“…Liquid-phase chemical scrubbing with amines suffers from inherently high regeneration cost and inefficiency (Corma et al 1995). Many materials have been developed for H 2 S adsorption from a great amount of industrial gas effluent streams (Untea et al 2009;Subrenat et al 2008;Bagreev et al 2004;Polychronopoulou et al 2005). Adsorption by metal oxide sorbents is recognized to be an energy-efficient technology for H 2 S removal.…”

Section: Introductionmentioning

confidence: 99%

Removal of H2S from crude oil via stripping followed by adsorption using ZnO/MCM-41 and optimization of parameters

Hazrati

Abdouss

Vahid³

et al. 2014

Int. J. Environ. Sci. Technol.

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In the present work, H 2 S of crude oil was removed via a two-step method including stripping followed by adsorption. First, ZnO/MCM-41 adsorbents containing 5, 17.5 and 30 wt% of zinc were synthesized and characterized using XRD and nitrogen physisorption. Then, these materials were used as adsorbents for the removal of the H 2 S stripped from crude oil. At second step, the H 2 S of crude oil was extracted to gas phase by hot stripping. The obtained extract was collected in a storage tank for the subsequent H 2 S adsorption process. A threefactor Box-Behnken design with five center points and one response was performed for the optimization of adsorption of H 2 S. The influence of process parameters and their interactional effects on the adsorption of H 2 S were analyzed using the obtained adsorption experimental data. A model including three important factors, i.e., temperature, space velocity and amount of supported zinc and their interactions, was developed to generate the optimum condition. The point of Zn = 30 wt%, T = 300°C and space velocity = 3,000 h -1 had the optimum point with the highest break point time (t bp = 973 min).

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Novel Zn–Ti-based mixed metal oxides for low-temperature adsorption of H2S from industrial gas streams

Cited by 93 publications

References 27 publications

H2S and Siloxane D5 Removal from Anaerobic Digestion Gas by Adsorption

H2S and Siloxane D5 Removal from Anaerobic Digestion Gas by Adsorption

An experimental study of ash behaviour and the potential fate of ZnO/Zn in the Co-combustion of pulverised South African coal and waste tyre rubber

Removal of H2S from crude oil via stripping followed by adsorption using ZnO/MCM-41 and optimization of parameters

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